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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

37763 results found.

  1. GRB 050724: dust-scattered X-ray halo detected in SWIFT/XRT observation
  2. GRB 050726: early Swift XRT analysis results
  3. GRB 050724: Optical Variability in Nearby Galaxy
  4. GRB 050724: J-band observations
  5. GRB 050724: GMOS Imaging and Spectroscopy
  6. GRB 050724: SWIFT XRT refined position
  7. GRB 050724: spectroscopy of object in the XRT error circle
  8. GRB 050724: Optical limit
  9. GRB 050724: optical and near-IR observations
  10. GRB 050724: Optical imaging/astrometry
  11. GRB 050724: RTT150 optical observations
  12. GRB 050724: Swift/UVOT Upper Limit
  13. GRB 050724: early Swift XRT analysis results
  14. GRB 050724 : Lulin early R-band monitoring observations
  15. GRB050724: Refined analysis of the Swift-BAT possible short burst
  16. GRB 050724: possible host galaxy in DSS
  17. Swift-BAT trigger 147325 is not due to a real GRB
  18. GRB050723: XRT distributed coordinates are not related to the burst
  19. GRB 050721: early afterglow light curve
  20. GRB 050721A: Swift-BAT refined analysis
  21. Correction to GCN Circ 3474 on GRB050525A
  22. GRB 050721A: Early Swift XRT analysis results
  23. GRB050721A: optical decay
  24. GRB 050721: optical afterglow confirmed
  25. Swift BAT Trigger 146986 is SWIFT J1753.5-0127
  26. GRB 050721a: Optical Observations
  27. GRB 050709: Refined Spectral and Temporal Properties
  28. GRB 050717: PROMPT RcIc Observations
  29. GRB 050714a: Refined XRT analysis and afterglow confirmation
  30. Swift-BAT trigger 146731 is not a real GRB
  31. GRB 050712, Tautenburg optical afterglow observations
  32. Swift-BAT detection of a possible GRB
  33. GRB 050714B: VLT R-band observations
  34. GRB 050717: Additional LCO observations
  35. GRB050717
  36. GRB 050716; J-band observations
  37. Konus-Wind observation of GRB 050717
  38. GRB 050717: LCO near-IR observations
  39. Swift/UVOT Observations of GRB 050717
  40. GRB 050717: Swift-BAT refined analysis
  41. GRB 050717: Refined XRT analysis.
  42. GRB050712: optical limits
  43. Swift detection of GRB 050717
  44. GRB 050716 - UKIRT identification of candidate afterglow
  45. Swift UVOT Observations of GRB 050716
  46. GRB 050716: Refined XRT analysis.
  47. GRB 050716: Lulin B and R band optical observations
  48. GRB050716, optical observation
  49. GRB 050716: Optical Observations
  50. GRB050716: Faulkes North Telescope observation
  51. Swift/BAT detection of GRB 050716
  52. GRB 050715: Swift-BAT detection
  53. Swift UVOT Observations of GRB 050714B
  54. Konus-Wind observation of GRB 050713A
  55. GRB 050714B: refined XRT analysis
  56. GRB 050713b: RTT150 optical observations
  57. GRB 050714B: candidate afterglow does not fade
  58. GRB050714B: Refined analysis of the Swift-BAT burst
  59. GRB 050714B: optical afterglow
  60. Swift detection of a long transient (GRB 050714B?)
  61. GRB 050709: optical afterglow candidate
  62. GRB 050714, R-band candidate
  63. GRB 050714: Swift XRT afterglow position
  64. GRB 050714, optical observations
  65. GRB 050714A: ROTSE-III Optical Limits
  66. GRB 050714 - A long GRB detected with INTEGRAL
  67. GRB 050713A: XRT refined analysis
  68. GRB 050709: Spectroscopy
  69. GRB 050713A: RAPTOR detection of early optical emission
  70. GRB050713B :Swift/UVOT observations
  71. GRB050712: TNG R-band observations
  72. GRB 050713B: Swift-BAT Refined Analysis
  73. Swift-BAT Trigger 145729 is not a GRB
  74. GRB 050713A: Swift/UVOT observation
  75. GRB 050713A : Swift-BAT Refined Analysis
  76. GRB 050713A : Lulin R-band observation
  77. GRB 050713A XMM-Newton observation
  78. GRB 050713b : Lulin R-band observations
  79. GRB050713B: Faulkes North Telescope observation
  80. RBO RI observations of GRB 050713A
  81. GRB 050713B
  82. GRB050709 : Chandra source optical counterpart
  83. GRB050713: Liverpool Telescope prompt observations
  84. GRB 050712, optical observations
  85. GRB 050713 : Planned XMM-Newton observation
  86. GRB050709: Candidate X-ray Afterglow from Chandra
  87. GRB 050713, R-band observations at NOT
  88. GRB 050713: ARC NIR Detections and Identification of Fading
  89. GRB050713: possible I-band afterglow
  90. GRB 050713: Swift detection of Bright Burst
  91. GRB 050713A: ROTSE-III Optical Limits
  92. GRB 050709: Swift UVOT and XRT observations
  93. GRB 050712: Swift-BAT Refined Analysis
  94. GRB 050712: Swift XRT afterglow position
  95. GRB 050712: Swift detection of a weak burst
  96. GRB 050709: LCO40 Observations
  97. GRB050709: A Possible Short-Hard GRB Localized by HETE
  98. PROMPT Rc Observations of GRB 050709
  99. GRB 050525a: PROMPT VRcIc Detections
  100. GRB 050525a: ARC 3.5-meter Optical and NIR Observations

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